U.S. patent number 11,301,088 [Application Number 16/317,231] was granted by the patent office on 2022-04-12 for fingerprint module includes identification components in an identification area and a chip disposed in a nonidentification area and display device.
This patent grant is currently assigned to WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO. LTD.. The grantee listed for this patent is WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.. Invention is credited to Xinglong He, Chunhung Huang, Yaoli Huang.
![](/patent/grant/11301088/US11301088-20220412-D00000.png)
![](/patent/grant/11301088/US11301088-20220412-D00001.png)
![](/patent/grant/11301088/US11301088-20220412-D00002.png)
United States Patent |
11,301,088 |
Huang , et al. |
April 12, 2022 |
Fingerprint module includes identification components in an
identification area and a chip disposed in a nonidentification area
and display device
Abstract
A fingerprint module includes a substrate, a plurality of
fingerprint identification components, a fingerprint chip, and a
plurality of metal wires. The substrate has an identification area
configured to identify a fingerprint and a non-identification area
located at a periphery of the identification area. The fingerprint
identification components are disposed in the identification area
of the substrate. The fingerprint chip is disposed in a
non-identification area of the substrate. Each of the fingerprint
identification components is electrically connected to the
fingerprint chip through a corresponding metal wire.
Inventors: |
Huang; Chunhung (Wuhan,
CN), Huang; Yaoli (Wuhan, CN), He;
Xinglong (Wuhan, CN) |
Applicant: |
Name |
City |
State |
Country |
Type |
WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD. |
Hubei |
N/A |
CN |
|
|
Assignee: |
WUHAN CHINA STAR OPTOELECTRONICS
TECHNOLOGY CO. LTD. (Wuhan, CN)
|
Family
ID: |
64189339 |
Appl.
No.: |
16/317,231 |
Filed: |
November 23, 2018 |
PCT
Filed: |
November 23, 2018 |
PCT No.: |
PCT/CN2018/117092 |
371(c)(1),(2),(4) Date: |
January 11, 2019 |
PCT
Pub. No.: |
WO2020/042394 |
PCT
Pub. Date: |
March 05, 2020 |
Prior Publication Data
|
|
|
|
Document
Identifier |
Publication Date |
|
US 20210357070 A1 |
Nov 18, 2021 |
|
Foreign Application Priority Data
|
|
|
|
|
Aug 28, 2018 [CN] |
|
|
201810989091.4 |
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G06F
3/0421 (20130101); G02F 1/13338 (20130101); G06V
40/1318 (20220101); G06F 3/04164 (20190501); G06F
3/0325 (20130101); G06F 3/047 (20130101) |
Current International
Class: |
G06F
3/042 (20060101); G06V 40/13 (20220101); G06F
3/03 (20060101); G06F 3/047 (20060101); G02F
1/1333 (20060101); G06F 3/041 (20060101) |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
207164735 |
|
Mar 2018 |
|
CN |
|
207182337 |
|
Apr 2018 |
|
CN |
|
Primary Examiner: Hermann; Kirk W
Attorney, Agent or Firm: Lottenberg; Geoffrey A. Berger
Singerman LLP
Claims
The invention claimed is:
1. A display device, comprising: a fingerprint module, a display
panel, and a backlight module, which are sequentially stacked,
wherein the fingerprint module comprises: a substrate having an
identification area configured to identify a fingerprint and a
non-identification area located at a periphery of the
identification area; a plurality of fingerprint identification
components disposed in the identification area of the substrate; a
fingerprint chip disposed in the non-identification area of the
substrate; and a plurality of metal wires, each of the fingerprint
identification components electrically connected to the fingerprint
chip through a corresponding metal wire; wherein the display device
further comprises a first light guide plate and an infrared light
emitting diode, the first light guide plate is disposed between the
display panel and the fingerprint module, and the infrared light
emitting diode is disposed at a side of the first light guide
plate.
2. The display device according to claim 1, wherein material of the
fingerprint identification component comprises lead sulfide, indium
antimonide, antimony doped gold, antimony doped mercury, antimony
tin lead, or mercury cadmium telluride.
3. The display device according to claim 1, wherein the fingerprint
identification components are arranged in a matrix.
4. The display device according to claim 1, wherein the backlight
module comprises a white light emitting diode and an infrared light
emitting diode.
5. The display device according to claim 4, wherein the backlight
module comprises a light guide plate, and the white light emitting
diode and the infrared light emitting diode are disposed at a side
of the light guide plate.
6. The display device according to claim 1, wherein the backlight
module comprises a white light emitting diode and a second light
guiding plate, and the white light emitting diode is disposed at a
side of the second light guiding plate.
7. The display device according to claim 1, further comprising a
first optical adhesive layer disposed between the fingerprint
module and the display panel.
8. The display device according to claim 1, further comprising a
cover plate disposed on the fingerprint module.
9. The display device according to claim 8, further comprising a
second optical adhesive layer disposed between the cover plate and
the fingerprint module.
10. The display device according to claim 1, wherein the display
panel comprises an upper polarizer, a first substrate, a liquid
crystal layer, a second substrate, and a lower polarizer, which are
sequentially stacked.
Description
FIELD OF INVENTION
The present disclosure relates to the field of fingerprint
identification technologies, and more particularly to a fingerprint
module and a display device.
BACKGROUND OF INVENTION
Fingerprints are textures formed by an uneven skin on fingertips of
human fingers. Capacitive fingerprint identification is based on
capacitance differences induced by depressed skin and raised skin
of fingertips. By collecting the capacitance differences induced by
the fingers pressing on a fingerprint reader, shapes of the
fingerprints can be restored and fingerprint identification can be
performed.
In the prior art, a technical solution of fingerprint
identification provides adding a fingerprint identification device
on a front surface or a back surface of a frame of the display
device. The frame has, for example, a limited area of 10 mm.sup.2.
The fingerprint identification device has a small identification
area. The fingerprint identification can only be done on the
fingerprint identification device and is limited to within the
limited area of 10 mm.sup.2 of the frame, which is not flexible. In
addition, additional fingerprint identification device increases
the cost of the display device and increase the frame size of the
display device.
Therefore, there is a need to provide a fingerprint module and a
display device to solve technical problems of the prior art.
SUMMARY OF INVENTION
In order to solve the above technical problems, an embodiment of
the present disclosure provide a fingerprint module. The
fingerprint module includes a substrate, a plurality of fingerprint
identification components, a fingerprint chip, and a plurality of
metal wires. The substrate has an identification area configured to
identify a fingerprint and a non-identification area located at a
periphery of the identification area. The fingerprint
identification components are disposed in the identification area
of the substrate. The fingerprint chip is disposed in a
non-identification area of the substrate. Each of the fingerprint
identification components is electrically connected to the
fingerprint chip through a corresponding metal wire. Material of
the fingerprint identification component includes lead sulfide,
indium antimonide, antimony doped gold, antimony doped mercury,
antimony tin lead, or mercury cadmium telluride. The fingerprint
identification components are arranged in a matrix.
According to an embodiment of the present disclosure, a fingerprint
module includes a substrate, a plurality of fingerprint
identification components, a fingerprint chip, and a plurality of
metal wires. The substrate has an identification area configured to
identify a fingerprint and a non-identification area located at a
periphery of the identification area. The fingerprint
identification components are disposed in the identification area
of the substrate. The fingerprint chip is disposed in a
non-identification area of the substrate. Each of the fingerprint
identification components is electrically connected to the
fingerprint chip through a corresponding metal wire.
In an embodiment of the present disclosure, material of the
fingerprint identification component includes lead sulfide, indium
antimonide, antimony doped gold, antimony doped mercury, antimony
tin lead, or mercury cadmium telluride.
In an embodiment of the present disclosure, the fingerprint
identification components are arranged in a matrix.
According to an embodiment of the present disclosure, a display
device includes a fingerprint module, a display panel, and a
backlight module, which are sequentially stacked. The fingerprint
module includes a substrate, a plurality of fingerprint
identification components, a fingerprint chip, and a plurality of
metal wires. The substrate has an identification area configured to
identify a fingerprint and a non-identification area located at a
periphery of the identification area. The fingerprint
identification components are disposed in the identification area
of the substrate. The fingerprint chip is disposed in a
non-identification area of the substrate. Each of the fingerprint
identification components is electrically connected to the
fingerprint chip through a corresponding metal wire.
In an embodiment of the present disclosure, material of the
fingerprint identification component includes lead sulfide, indium
antimonide, antimony doped gold, antimony doped mercury, antimony
tin lead, or mercury cadmium telluride.
In an embodiment of the present disclosure, the fingerprint
identification components are arranged in a matrix.
In an embodiment of the present disclosure, the backlight module
includes a white light emitting diode and an infrared light
emitting diode.
In an embodiment of the present disclosure, the backlight module
includes a light guide plate, and the white light emitting diode
and the infrared light emitting diode are disposed at a side of the
light guide plate.
In an embodiment of the present disclosure, the display device
further includes a first light guide plate and an infrared light
emitting diode, the first light guide plate is disposed between the
display panel and the fingerprint module, and the infrared light
emitting diode is disposed at a side of the first light guide
plate.
In an embodiment of the present disclosure, the backlight module
includes a white light emitting diode and a second light guiding
plate, and the white light emitting diode is disposed at a side of
the second light guiding plate.
In an embodiment of the present disclosure, the display device
further includes a first optical adhesive layer disposed between
the fingerprint module and the display panel.
In an embodiment of the present disclosure, the display device
further includes a cover plate disposed on the fingerprint
module.
In an embodiment of the present disclosure, the display device
further includes a second optical adhesive layer disposed between
the cover plate and the fingerprint module.
In an embodiment of the present disclosure, the display panel
includes an upper polarizer, a first substrate, a liquid crystal
layer, a second substrate, and a lower polarizer, which are
sequentially stacked.
In summary, beneficial effects of the embodiment of the present
disclosure are as follows. Compared with the prior art, in order to
solve the above technical problems, the fingerprint module and the
display device of the embodiment of the present disclosure can
increase a fingerprint identification area and achieve full-screen
fingerprint identification through the fingerprint identification
components disposed in the identification area of the substrate and
the fingerprint chip disposed in a non-identification area of the
substrate. In addition, the embodiment of the present disclosure
can effectively reduce the frame of the display device, which is
beneficial to the display device to increase a screen ratio and
beneficial to a full screen design.
DESCRIPTION OF DRAWINGS
FIG. 1 is a schematic structural view of a fingerprint module
according to an embodiment of the present disclosure.
FIG. 2 is a schematic structural view of a display device according
to an embodiment of the present disclosure.
FIG. 3 is a schematic structural view of a display device according
to another embodiment of the present disclosure.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
The following description of the various embodiments is provided to
illustrate the specific embodiments.
The embodiments described herein with reference to the accompanying
drawings are explanatory, illustrative, and used to generally
understand the present disclosure. Furthermore, directional terms
described by the present disclosure, such as top, bottom, front,
back, left, right, inner, outer, side, etc., are only directions by
referring to the accompanying drawings, and thus the used terms are
used only for the purpose of describing embodiments of the present
disclosure and are not intended to be limiting of the present
disclosure.
In the drawings, modules with similar structures are labeled with
the same reference number.
Refer to FIG. 1, a schematic structural view of a fingerprint
module according to an embodiment of the present disclosure is
provided.
Referring to FIG. 1, in an embodiment of the present disclosure, a
fingerprint module 10 includes a substrate 12, a plurality of
fingerprint identification components 14, a fingerprint chip 16,
and a plurality of metal wires 18. The substrate 12 has an
identification area 121 configured to identify a fingerprint and a
non-identification area 122 located at a periphery of the
identification area 121. The fingerprint identification components
14 are disposed in the identification area 121 of the substrate 12.
The fingerprint chip 16 is disposed in a non-identification area
122 of the substrate 12. Each of the fingerprint identification
components 14 is electrically connected to the fingerprint chip 16
through a corresponding metal wire 18. The embodiment of the
present disclosure can increase a fingerprint identification area
and achieve full-screen fingerprint identification through the
fingerprint identification components 14 disposed in the
identification area 121 of the substrate 12 and the fingerprint
chip 16 disposed in a non-identification area 122 of the substrate
12.
In details, material of the fingerprint identification components
14 include photovoltaic material. Photoelectric material includes
infrared light detecting material for infrared photodetectors, such
as lead sulfide, indium antimonide, antimony doped gold, antimony
doped mercury, antimony tin lead, or mercury cadmium telluride. The
fingerprint identification components 14 are arranged in a matrix.
The fingerprint identification components 14 are, for example, a
minimum fingerprint identification unit within the identification
area 121.
In details, one end of each metal wire 18 is electrically connected
to a corresponding fingerprint identification component 14, and
another end of each metal wire 18 is electrically connected to the
fingerprint chip 16. Each metal wire 18 spans the identification
area 121 and the non-identification area 122 of the substrate
12.
In details, the fingerprint identification components 14 determine
a magnitude of generated currents by absorbing an amount of
infrared light, and the generated currents flow into the
fingerprint chip 16 via the metal wire 18. The fingerprint chip 16
analyzes a relative magnitude of currents of each fingerprint
identification component 14 to calculate a fingerprint texture
image.
Refer to FIG. 2, a schematic structural view of a display device
according to an embodiment of the present disclosure is
provided.
Referring to FIG. 2, a display device 20 of the embodiment of the
present disclosure includes the fingerprint module 10, a display
panel 22, and a backlight module 24, which are sequentially
stacked. The specific structure and operation mode of the
fingerprint module 10 are as illustrated in FIG. 1 and will not be
repeatedly described herein.
The backlight module 24 includes a white light emitting diode 241
and an infrared light emitting diode 242. In details, the backlight
module 24 includes a light guide plate 243, and the white light
emitting diode 241 and the infrared light emitting diode 242 are
disposed at a side of the light guide plate 243.
In details, the display device 20 further includes a first optical
adhesive layer 26, a second optical adhesive 27, and a cover plate
28. The first optical adhesive layer 26 is disposed between the
fingerprint module 10 and the display panel 22. The first optical
adhesive layer 26 is configured to bond the fingerprint module 10
and the display panel 22 to stably fix the fingerprint module 10 on
the display panel 22. The cover plate 28 is disposed on the
fingerprint module 10 for protecting the fingerprint module 10. The
second optical adhesive layer 27 is disposed between the cover
plate 28 and the fingerprint module 10. The second optical adhesive
layer 27 is configured to bond the cover plate 28 and the
fingerprint module 10 to stably fix the cover plate 28 to the
fingerprint module 10 to protect the fingerprint module 10.
In details, the first optical adhesive layer 26 and the second
optical adhesive layer 27 are, for example, an optically clear
adhesive (OCA).
In details, the display panel 22 includes an upper polarizer 222, a
shielding layer 223, a first substrate 224, a liquid crystal layer
226, a second substrate 228, and a lower polarizer 230, which are
sequentially stacked. The first substrate 224 is disposed opposite
to the second substrate 228. The liquid crystal layer 226 is
interposed between the first substrate 224 and the second substrate
228. In the embodiment, the first substrate 224 is a color filter
(CF) substrate including a filter layer 225, and the second
substrate 228 is a thin film transistor (TFT) substrate. The upper
polarizer 222 is disposed between the fingerprint module 10 and the
first substrate 224, and the lower polarizer 230 is disposed
between the backlight module 24 and the second substrate 228. The
upper polarizer 222 can pass light having a polarization direction
in a first direction, and the lower polarizer 230 can pass light
having a polarization direction in a second direction perpendicular
to the first direction.
In details, the backlight module 24 can simultaneously emit uniform
white visible light 40 and uniform infrared light 50 through the
white light emitting diode 241 and the infrared light emitting
diode 242. When the uniform infrared light is irradiated onto the
fingerprint identification components 14 in the fingerprint module
10, all the fingerprint identification components 14 generate
currents of same magnitude, and the currents at this time are a
baseline current, and the fingerprint chip 16 records the baseline
current. When there is a finger touch on the cover plate 28,
reflection intensities of fingerprint patterns to the infrared
light are different, and intensities of the reflected infrared
light on the different fingerprint identification components 14 are
different. The currents at this time are induced currents (raw
data). The fingerprint chip 16 records the induced currents
currently. The currents generated by the fingerprint are equal to a
difference between the induced currents and the baseline current.
The fingerprint chip 16 converts the difference between the induced
currents and the baseline current into a fingerprint image.
Refer to FIG. 3, a schematic structural view of a display device
according to another embodiment of the present disclosure is
provided.
Referring FIG. 3, a display device 30 of the embodiment of the
present disclosure includes the fingerprint module 10, a display
panel 32, and a backlight module 34, which are sequentially
stacked. The specific structure and operation mode of the
fingerprint module 10 are as illustrated in FIG. 1 and will not be
repeatedly described herein.
In details, the display device 30 further includes a first light
guide plate 35 and an infrared light emitting diode 36. The first
light guide plate 35 is disposed between the display panel 32 and
the fingerprint module 10, and the infrared light emitting diode 36
is disposed at a side of the first light guide plate 35. The
backlight module 34 includes a white light emitting diode 342.
In details, the backlight module 34 includes a second light guide
plate 344 disposed at a side of the second light guide plate
344.
In details, the display device 30 further includes a first optical
adhesive layer 37, a second optical adhesive 38, and a cover plate
39. The first optical adhesive layer 37 is disposed between the
fingerprint module 10 and the display panel 32. The first optical
adhesive layer 37 is configured to bond the fingerprint module 10
and the display panel 32 to stably fix the fingerprint module 10 on
the display panel 32. The cover plate 39 is disposed on the
fingerprint module 10 for protecting the fingerprint module 10. The
second optical adhesive layer 38 is disposed between the cover
plate 39 and the fingerprint module 10. The second optical adhesive
layer 38 is configured to bond the cover plate 39 and the
fingerprint module 10 to stably fix the cover plate 39 to the
fingerprint module 10 to protect the fingerprint module 10.
In details, the first optical adhesive layer 37 and the second
optical adhesive layer 38 are, for example, an optically clear
adhesive (OCA).
In details, the display panel 32 includes an upper polarizer 322, a
shielding layer 323, a first substrate 324, a liquid crystal layer
326, a second substrate 328, and a lower polarizer 330, which are
sequentially stacked. The first substrate 324 is disposed opposite
to the second substrate 328. The liquid crystal layer 326 is
interposed between the first substrate 324 and the second substrate
328. In the embodiment, the first substrate 324 is a color filter
(CF) substrate including a filter layer 325, and the second
substrate 328 is a thin film transistor (TFT) substrate. The first
light guide plate 35 is disposed between the upper polarizer 322
and the fingerprint module 10. The upper polarizer 322 is disposed
between the fingerprint module 10 and the first substrate 324, and
the lower polarizer 330 is disposed between the backlight module 24
and the second substrate 328. The upper polarizer 322 can pass
light having a polarization direction in a first direction, and the
lower polarizer 330 can pass light having a polarization direction
in a second direction perpendicular to the first direction.
In details, the white light emitting diode 342 of the backlight
module 34 emits uniform white visible light 40. The first light
guide plate 35 between the upper polarizer 322 and the fingerprint
module 10 converts a point light source of the infrared light
emitting diode 36 into a surface light source that is uniformly
illuminated upward. When a uniform infrared light 50 is irradiated
onto the fingerprint identification components 14 in the
fingerprint module 10, all the fingerprint identification
components 14 generate currents of same magnitude, and the currents
at this time are a baseline current, and the fingerprint chip 16
records the baseline current. When there is a finger touch on the
cover plate 28, reflection intensities of fingerprint patterns to
the infrared light are different, and intensities of the reflected
infrared light on the different fingerprint identification
components 14 are different. The currents at this time are induced
currents (raw data). The fingerprint chip 16 records the induced
currents currently. The currents generated by the fingerprint are
equal to a difference between the induced currents and the baseline
current. The fingerprint chip 16 converts the difference between
the induced currents and the baseline current into a fingerprint
image.
In summary, the fingerprint module and the display device of the
embodiment of the present disclosure can increase a fingerprint
identification area and achieve full-screen fingerprint
identification through the fingerprint identification components
disposed in the identification area of the substrate and the
fingerprint chip disposed in a non-identification area of the
substrate. In addition, the embodiment of the present disclosure
can effectively reduce the frame of the display device, which is
beneficial to the display device to increase a screen ratio and
beneficial to a full screen design.
Although the present disclosure is described via one or more
embodiments, those of ordinary skill in the art can come up with
equivalent variations and modifications based upon the
understanding of the specification and the accompanying drawings.
The present disclosure includes all such modifications and
variations, and is only limited by the scope of the appended
claims. In particular, as to the various functions performed by the
components described above, the terms used to describe the
components are intended to correspond to any component performing
the specific functions (e.g., which are functionally equivalent) of
the components (unless otherwise indicated), even those which are
structurally different from the disclosed structure for performing
the functions in the exemplary embodiments in the specification
shown herein. In addition, although a particular feature in the
specification is disclosed in only one of many embodiments, this
feature may be combined with one or more features in other
embodiments which are desirable and advantageous to a given or
particular application. Moreover, the terms "include", "have",
"consist of", or variations thereof used in the detailed
description or the claims are intended to be used in a manner
similar to the term "comprising".
In summary, although the preferable embodiments of the present
disclosure have been disclosed above. It should be noted that those
of ordinary skill in the art can make a variety of improvements and
substitutions on the premise of not deviating from the technical
principle of the present disclosure, and these improvements and
substitutions should be encompassed within the protection scope of
the present disclosure.
* * * * *